Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66ef14e1a828d8d…

MALICIOUS

PDF

91.7 KB Created: 2021-07-30 07:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eae4d434a9c325e06997d5e34b157ba6 SHA-1: 39d6d1631ea919fdefe5d7ec6f8857830ba14b00 SHA-256: e66ef14e1a828d8d339cde48b8227b9d64539a3cb6c58674ca629228ef80daa2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/753e2c0d2058411b62771fda6c3ad9c6/borarasuduwam.pdf In PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ajrunho3l3aqmjag6b1us6g9v0/46078612058.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sg888r75rkg912nk9i43dd9c51/58946804301.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/66686628433.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/ruzorasazedusosup.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/f20e54eb397a7b5ce4351fdf3c3f6efc/37006856028.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/45834488295.pdfIn PDF document text
    • http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/zenifisagepobemoteni.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/kmpuv11742tv18hqhbbl41c4k0/8619861434.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/9335fc9b2adf8343842ee82ae0b7b1d1/gunenunuvufenoxokaseja.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/66662801639.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/fiwosifufuzedowilufibibam.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed5e3f402e---29416147163.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607005a2436ba---bulavitugavawapiguxijuse.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6mbm1bdn28ueg26h0oku8f6tsb/89560220976.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/40552295290.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/56394508023.pdfIn PDF document text
    • http://emirates-offshore.com/uploads/image/file/mefiradirawusu.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/galaxazawefarex.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210726032833.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/28459878650.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/35922793134.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/d7c9f1027091665ee417cab4cf25682d/35952797403.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/24bd62e6ca6685115a1cbb0f5c8e8f97/39215104894.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/492b09690efb6a5eb120c7f5eca7bbed/53710425879.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=pixel+gun+3d+hack+no+survey+no+download+no+human+verificationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 17372 bytes
SHA-256: 74588e62153cd10985bd7b278487ada8772ec5866eef831400b5a8f53ec4d49f
font_01_sfnt_off00012c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14472 11656 bytes
SHA-256: 6aefbcf6264702a8b8ea37ce17359e45db9eff82d4883e6e6495a3a4097549cd